After running an action in the debugger, turn it off

When running with "c", there was no problem, but when running with "n"
or "s", once the action was executed, it kept executing on the
following lines, which wasn't expected. Clearing $action here prevents
this unwanted behaviour.

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/perl5db/t/test-a-statement-3 b/lib/perl5db/t/test-a-statement-3
new file mode 100644
index 0000000000..b188c1c5c5
--- /dev/null
+++ b/lib/perl5db/t/test-a-statement-3
@@ -0,0 +1,6 @@
+use strict; use warnings;
+
+for my $x (1 .. 2) {
+    my $y = $x + 1;
+    my $x = $x - 1;
+}